| The Shop > Electronics & IC Programing |
| Digital oscilloscope project/kit |
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| John Stevenson:
Wouldn't do you any good Andrew. the lock was used to lock the big double doors for the INSIDE. The insurers weren't happy that I had them secure from the inside with a big M16 nut and bolt, they won't open from the outside. When I pointed out that once they were INSIDE they had access to plasma cutters still saws, grinders, oxy acetylene, chisels etc it went over their heads so we bought a lock just to keep them happy. Now I have swapped companies the lock is clipped to the security bars and we are back to the M16 nut and bolt. The other keys are for me bike lock but I have lost me bike........................ |
| PekkaNF:
--- Quote from: John Swift on January 16, 2016, 02:26:54 PM --- I guess you could duplicate the Y amp up to TP3 disconnect R13 from TP3 and add a switch to select Y or external trigger source --- End quote --- Oh, that will clear it! I had wrong diagram! Found all relevat parts on: DSO 138 Oscilloscope DIY Kit Rev. 04 Applicable models: 13803K, 13804K Starts to look very promissing! Thank you very much! Pekka |
| wheeltapper:
:D :D :D I've spent the afternoon assembling the component tester and it's case and it appears to work perfectly. :ddb: :ddb: :ddb: :ddb: there weren't any :zap: :zap: either. trying to figure out the calibration was a bit of a bugger, there are online instructions but they aren't very clear...................or I'm thick :bang: choose whichever you like. Roy. |
| hermetic:
Andrew, I have seen curtains made from 2 layers of bubblewrap hung inside roller shutters, keeps it a lot warmer. Phil |
| John Swift:
decided to assemble my DSO138 oscilloscope kit this afternoon it worked first time even though the solder didn't flow that well on the surface mount components - an excuse to buy a smt work station I think ? for now I've used the switches provided but may change them when I mount it in a box modding is a must ! two things needs investigating the variable capacitor C6 does not appear to do much and the trace shows some noise from the power supply http://forum.banggood.com/forum-topic-61279.html John added picture of screen showing the noise on the trace - not too bad considering its a £15 kit |
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